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aluminum foil used to package food is approximately 0.001 inch thick. assume that all of the unit cells of the aluminum are arranged so that a is perpendicular to the foil surface. for a 4in x 4in square of foil determine the total number of unit cells in the foil and the thickness of the foil in number of unit cells
a horizontal cylindrical tank 4 ft in diameter and 10 ft long is full of water. find the work done in pumping the water to a point 4 above the top of the tank.
The National Institute for Occupational Safety and Health (NIOSH) sets standards for CCl4 in air at 12.6 mg/m^3 of air (a time average over 40 hr). The CCl4 found in a sample is 4800 ppb. Does the sample meet the NIOSH standard
A big municipal utility district is considering two large-scale conduits. The first includes construction of a steel pipeline at a cost of $200 million.
Cancer is the uncontrolled growth of abnormal cells in the body resulting in tumours that can be benign or malignant (cancerous cells). A proper treatment is necessary to fight with this serious disease.
The pipes holding the boards were placed 10 ft apart across the dam. There were 20 pipes and each one was designed to fail under a bending moment of 1625 ft-lb how deep will the water be on the flash boards when failure occurs
The pipe has a flow of 5 m3/s. The stream's chloride concentration just upstream of the pipe's dischage is 12 mg/L, and the runoff pipe's discharge has a chloride concentration of 40 mg/L. Chloride is a conservative substance.
Knowing that the coefficient of kinetic friction between a sled and the run is 0.10 and that the speed of the sled is 25 ft/s at B, determine the tangential component of the acceleration of the sled a) just before it reaches B, b) just after it pa..
Vehicles begin to arrive at a toll booth at 850 am with an arrival rate of x(t) = 4.1 + .01t (with t in min and x(t) in veh /min.) The toll booth opens at 9am and processes vehicles at a rate of 12 per minute throughout the day. Assuming D/D/1 que..
A 200 foot long, 2.5 feet in diameter, straight, corrugated metal storm drain pipe, is used to drain a parking lot. The elevation difference between the pipe ends is 8 feet. What velocity would be expected
The meter inlet and throat are connected by the two legs of a mercury manometer. Use the Bernoulli equation to describe how this manometer can be used to measure the flow rate through the meter.
Starting from x = 0 with no initial velocity, the acceleration of a race car is defined by the relation a = 6.8e-0.00057x, where a and x are expressed in m/s2 and meters, respectively. Determine the position of the race car when v = 30 m/s.
A u-tube manometer is used to measure the pressure of a vessel under vacuum. Assume the manometer is open to atmospheric pressure (101.325 kPa) and the density of the fluid in the manometer is 12.0 g/cm3.
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